Priority Date: 21.10.13 (KR 20130125215)

Structure for reducing tunnel micro pressure wave including air pipe

  • Application ID: EP14188267
  • Status: The patent has been granted


Employment test 11 - 50 employees
Company dna beck greener
operating since 1974
Headquarter in London and 1 office
active in Legal Services, IP Consulting, and IP-related Communication Service


This EP application has the IPC class E21 (EARTH OR ROCK DRILLING; MINING). Here you find a list of all patent agent firms which are specialized in this IPC class. For a similar patent, they might be a good choice.


  • 21.10.2013 - Priority Date (KR 20130125215)
  • 22.04.2015 - Publication A2 (EP2863009)
  • 13.04.2016 - Publication A3 (EP2863009)
  • 25.10.2017 - Publication B1 (EP2863009)

IPC Classification